CH444976A - Electric discharge tube with a cathode, the surface of which has parts with higher and parts with lower electron emission - Google Patents

Electric discharge tube with a cathode, the surface of which has parts with higher and parts with lower electron emission

Info

Publication number
CH444976A
CH444976A CH491166A CH491166A CH444976A CH 444976 A CH444976 A CH 444976A CH 491166 A CH491166 A CH 491166A CH 491166 A CH491166 A CH 491166A CH 444976 A CH444976 A CH 444976A
Authority
CH
Switzerland
Prior art keywords
parts
cathode
discharge tube
electric discharge
electron emission
Prior art date
Application number
CH491166A
Other languages
German (de)
Inventor
Teunis Vlaardingerbroe Marinus
Gerhardus Dorgelo Eduard
Original Assignee
Philips Nv
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Nv filed Critical Philips Nv
Publication of CH444976A publication Critical patent/CH444976A/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
    • H01J1/28—Dispenser-type cathodes, e.g. L-cathode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/14—Solid thermionic cathodes characterised by the material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J21/00—Vacuum tubes
    • H01J21/02—Tubes with a single discharge path
    • H01J21/06—Tubes with a single discharge path having electrostatic control means only
    • H01J21/065—Devices for short wave tubes
CH491166A 1965-04-07 1966-04-04 Electric discharge tube with a cathode, the surface of which has parts with higher and parts with lower electron emission CH444976A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6504397A NL6504397A (en) 1965-04-07 1965-04-07

Publications (1)

Publication Number Publication Date
CH444976A true CH444976A (en) 1967-10-15

Family

ID=19792862

Family Applications (1)

Application Number Title Priority Date Filing Date
CH491166A CH444976A (en) 1965-04-07 1966-04-04 Electric discharge tube with a cathode, the surface of which has parts with higher and parts with lower electron emission

Country Status (8)

Country Link
US (1) US3402314A (en)
AT (1) AT262459B (en)
BE (1) BE679168A (en)
CH (1) CH444976A (en)
DE (1) DE1564397C3 (en)
ES (1) ES325122A1 (en)
GB (1) GB1100420A (en)
NL (1) NL6504397A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3648096A (en) * 1968-09-26 1972-03-07 Gen Electric Electron beam focusing bipotential cathode
DE2449796C3 (en) * 1974-10-19 1980-03-06 Philips Patentverwaltung Gmbh, 2000 Hamburg Supply cathode for a grid-controlled electron tube and process for their manufacture
US3967150A (en) * 1975-01-31 1976-06-29 Varian Associates Grid controlled electron source and method of making same
DE2535467C2 (en) * 1975-08-08 1985-06-05 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Method of making a cathode of a grid controlled power tube
EP0004424A1 (en) * 1978-03-23 1979-10-03 Thorn Emi-Varian Limited Thermionic cathode
US4250428A (en) * 1979-05-09 1981-02-10 The United States Of America As Represented By The Secretary Of The Army Bonded cathode and electrode structure with layered insulation, and method of manufacture
RU2314589C2 (en) * 2005-11-07 2008-01-10 ООО "Инновационный центр при РГРТА" Gas-discharge switching device

Also Published As

Publication number Publication date
NL6504397A (en) 1966-10-10
GB1100420A (en) 1968-01-24
DE1564397B2 (en) 1974-04-04
BE679168A (en) 1966-10-06
ES325122A1 (en) 1967-01-01
DE1564397C3 (en) 1974-10-31
DE1564397A1 (en) 1970-02-12
AT262459B (en) 1968-06-10
US3402314A (en) 1968-09-17

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